package r7;
//123
public class Example04 {
    public static void main(String[] args) {
        String s= "itcast";
        System.out.println("将it替换成cn.it的结果:"+s.replace("it","cn.it"));
        String s1 = "itcast";
        System.out.println("去除字符串两端空格后的结果:"+ s1.trim());
        System.out.println("去除字符串中所有空格后的结果:"+ s1.replace("",""));
    }
}
